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File Created: 15-Dec-1987 by Gordon S. Archer (GSA)
Last Edit:  28-Mar-2022 by Nicole Barlow (NB)

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NMI 104B1 Au6
Name A VEIN, UNICORN, GOOD HOPE Mining Division Skeena
BCGS Map 104B020
Status Showing NTS Map 104B01E
Latitude 056º 07' 16'' UTM 09 (NAD 83)
Longitude 130º 01' 09'' Northing 6220032
Easting 436641
Commodities Gold, Silver, Lead, Zinc Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
I02 : Intrusion-related Au pyrrhotite veins
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The A Vein, which is located 800 metres north-northeast of the Big Missouri deposit, lies within south-southeast striking, moderately dipping andesite, agglomerate and lapilli tuff, with interbedded cherty tuff of the Lower Jurassic Unuk River Formation. (See Big Missouri (104B 046) for enhanced geology).

The A Vein, which strikes east and dips 60 degrees south, occurs in a 12.2 to 15.2 metre wide shear zone which cross-cuts a north-trending altered zone (see Unicorn (104B 044)). The occurrence lies immediately west of the north trending Union Creek Fault. The vein is cut by southeast-striking lamprophyre dykes.

Mineralization is erratic and consists of disseminated pyrite, sphalerite, and galena, with reports of visible gold in quartz. A composite grab sample along the vein assayed 4.8 grams per tonne gold and 463 grams per tonne silver (Cochrane, 1974).

In 2009, resampling of the A Vein trenches by Ascot Resources yielded good assay results. In 2010, Ascot targeted 2 drillholes on the A Vein which Ascot included in the central portion of the Unicorn zone (104B 044). It is located at a flat area along the creek where previous operators identified a small outcrop of mineralization in several trenches. Drill hole P10-056 was located on the same pad as P10-055 but oriented south and oriented to target the A-Vein. A small zone was encountered at the top of the hole, 0.27 gram per tonne gold over 10.98 metres, and the rest of the hole was largely in a fault with a mix of broken up andesite and minor silica altered andesite plus clay altered (faulted) andesite (Assessment Report 32357). The presence of the fault (Union Creek Fault) in the gully is supported by the results of the drill hole but little mineralization that could be associated with the A-vein showing was encountered.

See Unicorn (104B 044), Big Missouri (104B 046) and Premier (104B 054) for related details of the Dilworth and Premier properties that were held as a single entity in the 2000s by Boliden Ltd and Ascot Resources.

EMPR AR 1919-77; 1920-63; 1922-84; 1923-83; 1925-103; *1928-115,116; 1929-109; *1930-114; 1948-70; 1949-75; 1950-78
EMPR BULL 58, p. 126; 63
EMPR EXPL 1975-179,180; 1978-257; 1979-280
EMPR FIELDWORK 1980, pp. 201-209; 1982, pp. 182-195; 1983, pp. 149-164; 1984, pp. 316-341; 1985, pp. 217,218; 1986, pp. 81-102
EMPR GEM 1974-331
EMPR OF 1987-22
EMPR PF (*RPT by D.R. Cochrane (1974): Unicorn Project)
EMR MP CORPFILE (Tournigan Mining Explorations Ltd.)
GSC MAP 9-1957; 1829; 307A; 1418A
GSC MEM 132; 175, p. 170
GSC P 89-1E, pp. 145-154
CIM SPEC. Vol. 37, pp. 202-215
Brown, D.A., (1987): Geological Setting of the Volcanic-Hosted Silbak Premier Mine, Northwestern British Columbia, M.Sc. Thesis, University of British Columbia (in Property File: 104B 054)
Dykes et al: GAC Fieldtrip "C" Guidebook, Oct. 19-21, 1988 (in Property File 104B 046)
Galley, A. (1981): *Volcanic Stratigraphy and Gold-Silver Occurrences on the Big Missouri Claim Group, Stewart, British Columbia, M.Sc. Thesis, University of Western Ontario
Christopher, P.A. (2009-08-03): Technical Report on the Premier Gold Project
Kirkham, G. (2012-06-18): Technical Report on the Resource Estimate for the Premier Gold Property
Kirkham, G. (2012-08-20): Revised Technical Report on the Resource Estimate for the Premier Gold Property
Puritch, E. (2013-03-27): Technical Report and Resource Estimate for the Big Missouri and Martha Ellen Deposits, Premier Gold Property
Rennie, D.W. (2018-06-22): Technical Report on the Premier-Dilworth Project
Rennie, D.W. (2019-01-17): Technical Report on the Premier Project
Bird, S.C., Meintjes, T. (2020-02-28): Resource Estimate Update for the Premier Gold Project, Stewart, British Columbia, Canada
Ascot Resources Limited (2020-05-22): Premier & Red Mountain Gold Project Feasibility Study NI 43-101 Technical Report, British Columbia